P generation Species I Species 2 GG HH II (2n - 6) AA BBCC (2n - 6) Gametogenesis Gametes АвС Fuse Hybridization between two diploid species (2n = 6) produces. F, generation Hybrid 2 a hybrid with six nonhomologous chromosomes. that do not par and segregate properly in meioss, resulting in unbalanced, nonvable gametes. ABCGHI (2n = 6) Nondisjunction at an early mitotic cell division Gametogenesis Вн Nonviable gametes Allotetraploid (amphidiploid) Nondisjunction leads to a doubling of all chromosomes producing an allo tetraplod (4n= 12). AABBCCGGHH II (4n - 12) Cametogenesis |Chromosome painng and segregation are normal, producing balanced gametes. ABCGHI ABCGHI Gametes

Q: Why is polyploidy more common in plants?

A: Introduction  Polyploidy: refers to the condition in which there are more than the two sets of…

Q: Is it possible for an organism to have a diploid number of chromosomes that is an odd number?

A: A diploid chromosome arises from both the parents and consists of 23 pairs of chromosomes. Before…

Q: Species I has 2 n = 8 chromosomes and species II has 2 n = 14 chromosomes. What would the expected…

A: Trisomy is a type of aneuploidy that is characterized by the presence of an extra chromosome in the…

Q: You are interested in studying the evolution of Rnase-based gametophytic self-incompatibility. You…

A: Explanation: -Assuming random dispersal of pollen, the fraction of S1 pollen grains that will be…

Q: Species I is diploid (2 n = 8) with chromosomes AABBCCDD; related species II is diploid (2 n = 8)…

A: Mutations are variations in codons caused by changes in nucleotides at or near the coding sequence.…

Q: You want to breed an apple tree that produced apples with no seeds, yet keeps the specific apples of…

A: Introduction:- An autopolyploid has an additional set of chromosomes that are identical to the…

Q: Imagine that Species A and Species B are closely related species. Species A has one hemoglobin gene,…

A: Genes are the functional unit of DNA that is responsible for the production of RNA by the…

Q: Species I is diploid (2 n = 8) with chromosomes AABBCCDD; related species II is diploid (2 n = 8)…

A: Chromosomes are defined as the thread-like structures that carry genetic information. Any change…

Q: Draw a Punnett square to illustrate this cross. On the Punnett square, label: gamete, offspring,…

A: In Labrador dogs the fur colour is controlled by a dominant gene (BB) coding for black colour fur of…

Q: Species I is diploid (2 n = 4) with chromosomes AABB; related species II is diploid (2 n = 6) with…

A: Ploidy can be defined as the number of “complete sets of chromosomes” in a cell. According to the…

Q: Species I is diploid (2 n = 8) with chromosomes AABBCCDD; related species II is diploid (2 n = 8)…

A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…

Q: What is the segregation ratio of monohybrid? Explain using a Punnett’s square and the generation…

A: In the laws of Segregation, the monohybrid cross expresses alleles only in the F2 generation.

Q: A large plant arose in a natural population. Qualitatively, it looked just the same as the others,…

A: Ploidy is usually explained as the number of sets of chromosomes, if you have two sets of…

Q: Species I is diploid (2 n = 4) with chromosomes AABB; related species II is diploid (2 n = 6) with…

A: Autotriploidy is a condition, in which a normal gamete (n) fuses with a gamete that has not…

Q: Please DEFINE the following terms, and explain how they apply to Andean Condors:   Homogametic sex…

A: Andean condor It is a bird of South America bird. It belongs to the family Cathartidae. It is the…

Q: Besides the ones mentioned in this textbook, look for other examplesof variations in euploidy.…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: in a robertsonian translocation the formation of viable gametes depends on

A: Robertsonian translocations are found in humans in the five acrocentric chromosome pairs (chromosome…

Q: Which structures shown above are typically haploid? lect one: A. Plant spores and animal zygotes B.…

A: Haploid cells are those cells which contain only one set of chromosomes. These structures are…

Q: Write down what letter combinations were on each of the 4 sister chromatids (a) before (b) after…

A: Before crossing over sister chromatids are : AA, BB, aa, bb After crossing over sister chromatids…

Q: As the number of generations increases in a population, it would be expected that O a. The number of…

A: The process of change in inherited traits within populations over successive generations is known as…

Q: A fruit fly was found to be heterozygous for a paracentric inversion. However, obtaining flies that…

A: A paracentric inversion is a type of chromosomal aberration characterized by an inverted segment of…

Q: Even in the absence of genetic recombination, meiosis is an important source of genetic variation in…

A: INTRODUCTION Genetic variation refers to differences in some of the genomes of members of identical…

Q: Polyploidy is very common in flowering plants: approximately 40% of all flowering plant species are…

A: Chromosome is the rod shaped, dark stained bodies which are most prominently seen in the metaphase…

Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.